The main changes from previous versions were swapping Beast 09 and Greylords for 2x Juggers and the Marksman, so that I have more Heavies to position forward to bait out the heavy trading, relying on Butcher to be able to scrap anything that charges my Juggers:)

When I get a little free time I'll review Karchev/Harkevich/Strakhov lists to see if it'd worth the additional effort over PoM. At the moment, in a team tournament, I'm leaning towards 'no' since the anti-magic skew that PoM has would probably help a lot in getting better matchups.

Yes, though I have to say that in Mk2 I got to use Boneshaker (or whatever his offensive spell is) more times than the Dark shroud aura.
That said, I like the redundancy of power buffs and the situational ability to 'sucker' shots onto a Wargus to trigger Vengeance on B3:) Stacking Silence of Death with Dark shroud gets Great Bears up to P+S 15, IFPs up to 17, Butcher up to 20 and his Warguses to 2x Pow 17 or a pow 21 Combostrike... That is a lot of Armor cracking before even considering the Warjacks:D

Switched out Ragman and Marksman to squeeze in a Bokur and min Mechanics and Behemoth instead of the 2 Juggers...

The Behemoth allows me to wait outside the enemy charge threat and still put some significant damage on their infantry/heavies and if they get within my charge ranges I can probably dismember almost anything that tries.
Bokur is there mainly to Shield guard potetial Eyryss distruptor bolts of some Crit KD or Crit Devastation shots.